Try this How To Bake A Potato recipe, or contribute your own.
Why does steam pressure matter when baking tubers? Potatoes contain roughly eighty percent water. As oven heat penetrates the starch granules, internal moisture converts to steam. Piercing the skin provides a necessary vent. Without these holes, expanding vapor can rupture the skin or cause the potato to burst inside the 375 degrees F oven.
Coating the exterior with olive oil creates a barrier that conducts heat efficiently across the surface. Coarser sea salt crystals adhere to the oil film. This combination draws surface moisture outward, yielding a crisp, savory skin that contrasts with the tender interior starches.
Baking takes between 45 and 60 minutes. Test donateness by inserting a metal skewer into the thickest part. Zero resistance indicates complete gelatinization of the starches. Cool any leftover tubers within two hours and store them refrigerated for up to four days. Reheat chilled spuds in a hot oven to restore the crisp perimeter before repurposing them into hashes or frittatas.